There will be, somewhere, in the dark blue admin world a 'casualty' cell. Currently the light blue version is at Innsworth, contat your admin staff and get the relevant contact card with the details on. It should work both ways too, get a card for your parents to keep in case contact is needed for an urgent and real reason and the system should get the message through, worldwide '24/7' as they say.
for real events it has worked well for me in the past.
If you try to get the family to contact you themselves in an event which requires your urgent attention it can bu@@er the system if it is shortcut.
HTH